You may not be familiar with Samsung Intensity and Samsung Intensity II because these are phones that have been released a long time ago. The display size of both phones are still very small, but they do have some differences in their capabilities. Samsung Intensity II is known to be the predecessor of Samsung Intensity.
The display size is .2 inches longer, and it already uses the LCD screen as compared to Samsung Intensity that uses a TFT screen. The main camera of Samsung Intensity is 1.3 MP while Samsung Intensity II is upgraded a bit with a 2-megapixel camera. Both come with a full keyboard that will ensure that creating messages will be easier and faster as compared to before.